10P, 20P, 30P air-cooled industrial ice water machine manufacturer

Refrigerant circulation system:

The liquid refrigerant in the evaporator absorbs heat from the water and begins to evaporate, eventually forming a certain temperature difference between the refrigerant and water. The liquid refrigerant also completely evaporates into a gaseous state, which is then sucked in and compressed by the compressor (increasing pressure and temperature). The gaseous refrigerant releases heat through the condenser and condenses into a liquid. After being throttled by an expansion valve (or capillary tube), it becomes a low-temperature and low-pressure refrigerant that enters the evaporator, completing the refrigerant circulation

Water circulation system:

The water pump is responsible for extracting water from the water tank and pumping it to the equipment that the user needs to cool. The chilled water takes away the heat and rises in temperature before returning to the chilled water tank.

Electrical self-control system:

Including power supply and automatic control parts.

The power supply is supplied to compressors, fans, water pumps, etc. through contactors.

The automatic control part includes a temperature controller, pressure protection, delay device, relay, overload protection, etc., which are combined to achieve functions such as automatic start stop and protection based on water temperature.

Folding edit this paragraph structure

Basic components of chiller refrigeration system:

Condenser: During the refrigeration process, the condenser plays a role in outputting heat energy and allowing the refrigerant to condense. After the high-pressure superheated vapor discharged from the refrigeration compressor enters the condenser, all the heat absorbed during its operation, including the heat absorbed from the evaporator, refrigeration compressor, and pipeline, is transferred to the surrounding medium (water or air) for removal; The high-pressure superheated vapor of the refrigerant condenses back into liquid. According to the different cooling media and cooling methods, condensers can be divided into three categories: water-cooled condensers, air-cooled condensers, and evaporative condensers

Liquid storage container: The liquid storage container is installed after the condenser and is directly connected to the condenser's discharge pipe. The refrigerant liquid in the condenser should flow smoothly into the accumulator, so as to fully utilize the cooling area of the condenser. On the other hand, when the heat load of the evaporator changes, the required amount of refrigerant liquid also changes accordingly, and at that time, the accumulator plays a role in regulating and storing the refrigerant. For small chiller refrigeration systems, a liquid storage device is often not installed, but a condenser is used to regulate and store refrigerant.

Dry filter: It is necessary to prevent moisture and dirt (oil stains, iron filings, copper filings) from entering the refrigeration cycle of the chiller. The main sources of moisture are trace amounts of moisture contained in newly added refrigerants and lubricating oils, or moisture caused by the entry of air during system maintenance. If the moisture in the system is not completely removed, when the refrigerant passes through the throttle valve (thermal expansion valve or capillary tube), the moisture may solidify into ice due to the decrease in pressure and temperature, causing channel blockage and affecting the normal operation of the refrigeration device. Therefore, a dry filter must be installed in the refrigeration system of the chiller.

Evaporator: An evaporator is a heat exchange device that relies on the evaporation (actually boiling) of refrigerant liquid to absorb heat from the cooled medium. Its function in the refrigeration system is to absorb heat (or output cooling capacity). In order to ensure the stable and long-lasting evaporation process, it is necessary to continuously use a refrigeration compressor to extract the evaporated gas and maintain a certain evaporation pressure.

Thermal expansion valve: In the refrigeration system of a chiller, the thermal expansion valve is both a flow regulating valve and a throttle valve in the refrigeration equipment. It is installed between the drying filter and the evaporator in the refrigeration equipment, and its temperature sensing package is wrapped around the outlet of the evaporator. Its main function is to reduce the flow and pressure of high-pressure and room temperature refrigerant liquid when it flows through the thermal expansion valve, turning it into low-temperature and low-pressure refrigerant wet vapor (mostly liquid, a small part steam) that enters the evaporator, vaporizes and absorbs heat inside the evaporator, and achieves the purpose of refrigeration and cooling.

Refrigerant: Most industrial chillers used in modern industry use R22 or R12 as refrigerants. Refrigerant is the flowing working fluid in refrigeration systems, whose main function is to carry heat and achieve heat absorption and release when the state changes.
Features of the Unit

Air cooled chillers can be used in small systems, while the vast majority of large units are water-cooled. The initial investment for water-cooled engines is slightly less than that for air-cooled engines But with the addition of cooling towers, computer rooms, electronic water treatment equipment, etc., there are not many places to go! Moreover, in terms of long-term operation, the refrigeration efficiency of water-cooled units will relatively decrease, while air-cooled units will not.

The air-cooled chiller unit adopts air cooling method, which eliminates the essential cooling tower, cooling water pump and pipeline system of the cooling water system, avoids condenser scaling and water pipe blockage in areas with poor water quality, and also saves water resources. It is the most economical and simple model for maintenance and repair in cold water air conditioning equipment products.

Air cooled chillers have slightly higher one-time investment than water-cooled chillers, but their annual operating costs are lower than water-cooled chillers. The building cost of the computer room is the lowest among various air conditioning cold and heat source systems, and the maintenance cost is about half of that of water-cooled or boiler systems.

The noise and volume of air-cooled chillers are higher than those of water-cooled ones, so they can only be installed outdoors. Most water-cooled units are installed indoors.

Product features of air-cooled chillers:

1. The compressor of the unit adopts a vortex type fully enclosed compressor and electronic control components, equipped with a condenser and evaporator made of high-efficiency and high-quality copper tubes for heat exchange;

2. Equipped with various safety protection devices, stable performance, low noise, long service life, and simple operation; Adopting a liquid crystal display human-machine interface, the operation is simple and convenient, and the operating status is clear at a glance;

3. The model adopts a single compressor or a combination of multiple compressors for refrigeration system. The compressor can automatically alternate operation according to load changes, balancing the operating hours of each compressor, achieving the effect of saving energy consumption and extending the service life of the chiller unit. Easy to regulate energy and more energy-efficient at partial loads;

4. The whole machine has a box type structure with a beautiful appearance and compact structure, which can be used to check the operation of the unit at any time; The unit can come with its own water tank and circulating water pump according to the cooling capacity, without the need for a cooling tower or cooling water pump, making installation and maintenance simple and convenient;

Folding edit function of this paragraph

1. The application of chillers in the cooling of plastic processing machinery molding molds can greatly improve the surface smoothness of plastic products, reduce surface wrinkles and internal stresses, prevent product shrinkage and deformation, facilitate demolding of plastic products, accelerate product shaping, and greatly improve the production efficiency of plastic molding machines;

2. Chillers are used in CNC machine tools, coordinate boring machines, grinding machines, machining centers, combination machine tools, and various precision machine tool spindle lubrication and hydraulic system transmission medium cooling. They can accurately control oil temperature, effectively reduce thermal deformation of machine tools, and improve machining accuracy of machine tools.

Folding edit this paragraph for cleaning

Because most cooling water contains calcium, magnesium ions, and acid carbonates. When the cooling water flows through the metal surface, carbonate is generated. In addition, oxygen dissolved in cooling water can cause metal corrosion and form rust. Due to the generation of rust and scale, the heat transfer efficiency of the water-cooled machine decreases. In severe cases, it is necessary to spray cooling water outside the shell. When scaling is severe, it can block the pipes and render the heat transfer effect ineffective. The research data shows that scale deposits have a significant impact on heat transfer losses, and as the amount of sediment increases, it leads to an increase in energy costs. Even a thin layer of scale can increase the operating cost of the scaling part in the equipment by more than 40%. Keeping the cooling channel free of mineral deposits can greatly improve efficiency, save energy, extend the service life of equipment, and save production time and costs.

For a long time, traditional cleaning methods such as mechanical methods (scraping, brushing), high-pressure water, chemical cleaning (acid washing), etc. have encountered many problems when cleaning equipment: they cannot completely remove deposits such as scale, acid liquids corrode equipment and form loopholes, residual acid causes secondary corrosion or corrosion under scale on materials, ultimately leading to equipment replacement. In addition, the cleaning waste liquid is toxic and requires a large amount of funds for wastewater treatment.

In response to the above situation, efforts have been made both domestically and internationally to develop cleaning agents with low corrosiveness to metals, and the successfully developed Fushitech cleaning agent. It has the characteristics of high efficiency, environmental protection, safety, and non corrosion. It not only has good cleaning effect but also does not corrode the equipment, ensuring the long-term use of the condenser. Fushitek cleaning agent (unique addition of wetting agent and penetrating agent) can effectively remove the most stubborn scale (calcium carbonate), rust, oil, mud and other sediments generated in water equipment, without causing harm to the human body. It will not corrode, pitting, oxidize or cause other harmful reactions to materials such as steel, copper, nickel, titanium, rubber, plastic, fiber, glass, ceramics, etc., which can greatly extend the service life of equipment.

Folding edit: Differences in this paragraph

Industrial chillers are divided into water-cooled industrial chillers and air-cooled industrial chillers, with the main difference between the two being the condenser. The condenser of a water-cooled chiller mainly takes away heat by circulating cooling water, so the condenser of a water-cooled chiller is also commonly referred to as a water cannon. Unlike water-cooled industrial chillers, air-cooled industrial chillers use fans for heat dissipation. Typically, fin type condensers are used, where fins refer to aluminum sheets. The parts that require heat exchange are externally installed with aluminum sheets to achieve efficient heat dissipation, and then the hot air is extracted by a powerful fan.

So when the temperature in the workshop is high, the air-cooled chiller will not only be affected itself (high condenser temperature will directly cause high pressure alarm of the industrial chiller, and the cooling capacity will decrease), but also have a direct impact on the workshop temperature. The advantages of water-cooled chillers are obvious. Water cooled industrial chillers require a cooling tower to circulate cooling water for cooling, so installing a cooling tower, a cooling water circulation pump, and pipelines is relatively cumbersome to use a water-cooled chiller. Compared to air-cooled industrial chillers, their ease of movement pales in comparison. But in most cases, factories are already equipped with cooling water circulation systems.

Folding edit: Cooling principle in this paragraph

Air cooled chillers and water-cooled chillers are used for outdoor installation and operation. A air-cooled machine is a device that mechanically circulates air directly, and the condensing coil of the machine directly exhausts heat from the atmosphere for air cooling. Cooling machines are similar, but they implement water mist on the condenser coils to help cool the condenser, making the machine cooling machine more efficient than traditional air cooling. Remote cooling towers typically require air or refrigeration units for packaging cooling.

The refrigeration principle of water-cooled indirect cooling in the electroplating industry:

The water in the bottom basin of the cooling tower is pumped to the condenser of the chiller to cool it down. When it flows back into the cooling tower and sprays downwards, the water is cooled by the fan on the top of the cooling tower, and then flows back to the bottom basin of the cooling tower, and so on. At the same time as the condenser dissipates heat, the refrigerant inside liquefies and flows into the evaporator in the water tank for evaporation. During evaporation, heat is absorbed, which cools the water in the water tank. The cooled water is then transported to the heat exchanger (separated in the middle, with one side of water and one side of sulfuric acid) through a water pump, and the sulfuric acid is cooled through the process of heat transfer. This is a cyclic process. The advantage of this product is that it is easy to install, has a relatively longer service life than direct freezing, and is not easily corroded by acid and alkali.

The principle of water-cooled direct cooling refrigeration:

The water in the bottom basin of the cooling tower is pumped to the condenser of the chiller to cool it down, and then flows back to the cooling tower for spraying. When it goes down, the water is cooled by the fan on the top of the cooling tower and flows back to the bottom basin of the cooling tower, and this process repeats itself. At the same time as the condenser dissipates heat, the refrigerant inside liquefies and flows into the evaporator for evaporation. During evaporation, heat is absorbed, which cools the sulfuric acid (tank solution) in the evaporator. The cooled sulfuric acid is then transported to the electroplating (oxidation) tank through a water pump, and this is a cyclic process.

Direct freezing and indirect freezing of chillers have the same usage effect, but it is obvious that direct freezing chillers are not as safe as indirect freezing chillers, and the former equipment is prone to corrosion and has a shorter lifespan compared to indirect freezing chillers. Direct freezing equipment has a slight advantage in price, but in terms of service life, indirect freezing chillers are longer than direct freezing chillers, which can be used to calculate the value of indirect freezing chillers. This is also one of the development trends of environmentally friendly and energy-saving chillers.

Folding Editing: Application Fields of This Paragraph

Air cooled chillers are mainly used to cool the heating components of equipment, ensuring that the equipment operates normally at a constant temperature. The air-cooled chiller is suitable for high-speed spindles, electric spindles, CNC machine tools, coordinate boring machines, grinders, machining centers, laser marking machines, laser engraving machines, laser welding machines, laser coding machines, laser cutting machines and other equipment.

The air-cooled chiller model has a compact structure, small size, and is easy to move. Equipped with two working modes of constant temperature and intelligent temperature control, the intelligent temperature control mode can be adjusted to the corresponding level according to temperature changes
Four characteristics

1. The COP efficiency of air-cooled chillers is relatively low, around 2.6-3.3, and the building area used is generally not more than 10000 square meters. However, they can be used for both cooling and heating, and are more cost-effective for general shopping malls, small commercial buildings, and office buildings.

2. The COP of water-cooled chillers is generally high, around 4-5.5, suitable for large buildings and some process cooling.

3. In principle, the only difference is the condenser. Air cooled chillers use a fan to cool the refrigerant in the condenser, while water-cooled chillers use cold water to remove heat from the condenser and release it into the atmosphere through a cooling tower.

4. Water cooled chillers can only cool, and other heating methods such as electric heating, steam heating, or hot water boilers are required for heating.